U.S. patent number 6,507,491 [Application Number 09/983,116] was granted by the patent office on 2003-01-14 for pull/latch type fixing device for heat-radiating fin body.
This patent grant is currently assigned to Huey Shyang Ent. Co., Ltd.. Invention is credited to Wei Chen.
United States Patent |
6,507,491 |
Chen |
January 14, 2003 |
Pull/latch type fixing device for heat-radiating fin body
Abstract
A pull/latch type fixing device for head-radiating fin body,
including a heat-radiating fin body and two fastener units. Two
sides of top end of the heat-radiating fin body are respectively
formed with two latch grooves. Each fastener unit is inserted in
the latch groove, including a locating frame, a latch frame and a
pull lever. Two lateral walls downward extend from two ends of the
locating frame. The latch frame is bridged between the latch groove
and the locating frame. Two latch arms respectively downward extend
from two ends of the latch frame. The pull lever is pivotally
mounted on the latch frame and has a pair of cam plates. By means
of turning the pull lever, the latch arms of the latch frame are
biased inward by the lateral walls of the locating frame to tightly
hook the latch seat beside the chip.
Inventors: |
Chen; Wei (Taipei Hsien,
TW) |
Assignee: |
Huey Shyang Ent. Co., Ltd.
(Taipei Hsien, TW)
|
Family
ID: |
25529792 |
Appl.
No.: |
09/983,116 |
Filed: |
October 23, 2001 |
Current U.S.
Class: |
361/697; 165/121;
165/80.3; 248/510; 257/719; 257/727; 257/E23.084; 257/E23.086;
361/710; 361/719 |
Current CPC
Class: |
H01L
23/4006 (20130101); H01L 23/4093 (20130101); H01L
2924/0002 (20130101); H01L 2924/0002 (20130101); H01L
2924/00 (20130101) |
Current International
Class: |
H01L
23/34 (20060101); H01L 23/40 (20060101); H05K
007/20 () |
Field of
Search: |
;24/457-458
;165/80.2,80.3,185,121-122 ;174/16.3 ;248/505,526
;257/718-719,722,726-727
;361/687,690,695-697,704,707,709-710,715,719,720 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Thompson; Gregory
Attorney, Agent or Firm: Rosenberg, Klein & Lee
Claims
What is claimed is:
1. A pull/latch type fixing device for improving heat-radiating
capacity of an integrated circuit chip, the pull/latch type fixing
device comprising: (a) a latch seat mounted on a circuit board, the
latch seat including a plurality of latch holes formed on a
periphery thereof; (b) a heat-radiating fin body having an upper
surface and a lower surface, said heat-radiating fin body being
bridged over the latch seat, wherein each of two sides of the upper
surface of the heat-radiating fin body has formed thereon a latch
groove; and (c) a fastener unit including: (1) a locating frame
inserted in each of the latch grooves of the heat-radiating fin
body, wherein each of two ends of the locating frame includes a
downward extending lateral wall; (2) a latch frame mounted between
each of the latch grooves and a respective one of the locating
frames, wherein each of two ends of each of the latch frames
includes a downward extending latch arm, each of the latch frames
being formed with at least one projecting pivot seat, the pivot
seat passing through a respective one of the locating frames; and
(3) at least one pull lever, wherein a first end of the pull lever
is pivotally mounted in a respective one of the pivot seats of each
of the latch frames, the pull lever including a pair of cam plates
extending radially upward from two sides of the first end of the
pull lever, the cam plates being pivotally fitted in the pivot seat
of the respective one of the latch frames and engaging a respective
one of the locating frames, whereby the pull lever is operated to
pull the latch frame upward to cause each of the latch arms thereof
to engage in a respective one of the latch holes of the latch seat,
the heat-radiating fin body being forced oppositely downward,
whereby the lower surface of the heat-radiating fin body is firmly
applied to the chip to enhance the heat-radiating efficiency
thereof.
2. The pull/latch type fixing device as claimed in claim 1, wherein
the heat-radiating fin body includes: a base board section; two
lateral boards respectively extending upward from each of two sides
of the base board section, wherein a top end of each lateral board
has the latch groove formed thereon; a locking groove formed
adjacent to each of the latch grooves for threading screws therein;
and a heat-radiating fan removably attached to the heat-radiating
fin body by means of the screws.
3. The pull/latch type fixing device as claimed in claim 1, wherein
the locating frame includes: a body section; at least one fixing
wing integrally formed on and extending downward from a lateral
edge of the body section; and at least one projecting hook section
being formed on each of the at least one fixing wing for engaging a
bottom edge of a corresponding one of the latch grooves of the
heat-radiating fin body, wherein the body section has at least one
slot formed therein for upwardly extending the pivot seat of the
latch frame therethrough.
4. The pull/latch type fixing device as claimed in claim 3, wherein
edges of the body section of the locating frame further include at
least one locating plate for engaging with at least one lateral end
of a corresponding one of the latch grooves of the heat-radiating
fin body.
5. The pull/latch type fixing device as claimed in claim 1, each of
the latch frames further including a main body, the at least one
pivot seat projecting therefrom and each of the two latch arms
respectively extending at opposing ends thereof, wherein a free end
of each latch arm is inwardly bent to form a hook section for
engaging in the respective one of the latch holes of the latch
seat.
6. The pull/latch type fixing device as claimed in claim 1, wherein
a middle portion of each latch arm of the latch frame is bent
outwardly and downward to form a slope section, when the latch
frame is upward pulled by the pull lever, each of the slope
sections are forced inward by bottom edges of the respective one of
the lateral walls of the locating frame when the pull lever is
actuated, wherein a free end of each of the latch arms is
resiliently biased toward a respective one of the latch holes of
the latch seat.
7. The pull/latch type fixing device as claimed in claim 6, the
locating frame further including two guiding inclined boards
respectively outwardly extending from a free end of each of the
lateral walls thereof, such that the slope sections of each of the
latch arms are guided inward by the guiding inclined boards and the
hook sections of each of the latch arms are tightly engaged in the
latch holes of the latch seat when the pull lever is actuated.
8. The pull/latch type fixing device as claimed in claim 5, wherein
at least one reinforcing rib is formed on the main body of the
latch frame.
9. The pull/latch type fixing device as claimed in claim 1, wherein
each cam plate of the pull lever is defined by a first cam edge, a
second cam edge and a third cam edge, wherein a first distance is
defined between the first cam edge and the pivot hole, a second
distance is defined between the second cam edge and the pivot hole,
the second distance being greater than the first distance, and a
third distance being defined between the third cam edge and the
pivot hole, the third distance being greater than the second
distance.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a pull/latch type fixing device
for heat-radiating fin body. By means of turning a pull lever, a
latch frame is drivingly pulled upward to tightly latch with a
latch seat of a circuit board. The heat-radiating fin body is
oppositely pushed downward to make the bottom thereof tightly
attach to a chip so as to enhance the heat-radiating efficiency for
the chip.
2. Description of the Prior Art
A chip such as a central processing unit (CPU) used in a computer
or a servo works at very high frequency. After having activated for
a period of time, the chip will heat and have high temperature. In
case the heat of the chip is not radiated to lower the temperature,
the chip will damage. Conventionally, a heat-radiating fin body is
tightly attached to the chip for quickly radiating the heat to
outer side. In order easily install the heat-radiating fin body, a
latch seat is mounted around the chip of the main board. A fastener
is used to tightly latch the heat-radiating fin body on the latch
seat with the bottom of the heat-radiating fin body tightly
attaching to the chip. The existent fastener is generally made of
metal board by punching. Two ends of the fastener are punched to
form two latch arms which are directly latched with the latch seat
for tightly binding the heat-radiating fin body on the chip. When
latched with the latch seat, no stopper member is provided on outer
side of the latch arm to stop the latch arm from being outward
resiliently stretched by external force. Therefore, when the
computer is activated or experienced a falling test, the latch arms
of the fastener are very likely to unlatch from the latch seat due
to external force. Under such circumstance, the heat-radiating fin
body will loosen and drop from the chip.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to
provide a pull/latch type fixing device for heat-radiating fin
body, including a heat-radiating fin body and at least one fastener
unit.
Two sides of top end of the heat-radiating fin body are
respectively formed with two latch grooves. The fastener unit
includes a locating frame inserted in the latch groove of the
heat-radiating fin body. Two ends of the locating frame
respectively have two downward extending lateral walls. The
fastener unit further includes a latch frame bridged between the
latch groove and the locating frame. Two ends of the latch frame
respectively have two downward extending latch arms. The latch
frame is formed with at least one projecting pivot seat passing
through the locating frame. The fastener unit further includes at
least one pull lever. A first end of the pull lever is pivotally
mounted in the pivot seat of the latch frame. A pair of cam plates
upward radially extend from two sides near the first end of the
pull lever. The cam plates are pivotally fitted in the pivot seat
of the latch frame. In normal state, the cam plates lean against
the locating frame, whereby the pull lever can be operated and
biased to drivingly pull the latch frame upward and make the latch
arms thereof respectively tightly hook in the latch holes of the
latch seat. The lateral walls of two ends of the locating frame to
hold and clamp outer sides of the latch arms of the latch frame and
prevent the latch arms from outward resiliently stretching. The
heat-radiating fin body is oppositely downward pressed, whereby the
bottom thereof tightly attaches to the chip to enhance the
heat-radiating efficiency.
The present invention can be best understood through the following
description and accompanying drawings wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective exploded view of the present invention;
FIG. 2 is a perspective exploded view of the present invention and
the latch seat and chip;
FIG. 3 is a perspective assembled view of the present invention and
the latch seat and chip in a not latched state;
FIG. 4 is a perspective assembled view of the present invention and
the latch seat and chip in a latched state;
FIG. 5 is a completely assembled view of the present invention;
FIG. 6 is a sectional view taken along line 6--6 of FIG. 3; and
FIG. 7 is a sectional view taken along line 7--7 of FIG. 4.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Please refer to FIGS. 1 to 5. The fixing device for heat-radiating
fin body of the present invention includes a heat-radiating fin
body 1 and at least one fastener unit 2. The heat-radiating fin
body 1 is overlaid on a chip 4. Two sides of top end of the
heat-radiating fin body 1 are respectively formed with two latch
grooves 121. The fastener unit 2 includes a locating frame 21
inserted in the latch groove 121 of the heat-radiating fin body 1.
Two ends of the locating frame 21 respectively have two downward
extending lateral walls 214. The fastener unit 2 further includes a
latch frame 22 bridged between the latch groove 121 and the
locating frame 21. Two ends of the latch frame 22 respectively have
two downward extending latch arms 222. In addition, the latch frame
22 is formed with at least one projecting pivot seat 221 passing
through the locating frame 21. The fastener unit 2 further includes
at least one pull lever 23. A pair of cam plates 231 upward
radially extend from two sides near a first end of the pull lever
23. Two sides of the cam plates 231 a r e formed with pivot holes
232. A pivot pin 24 is sequentially passed through the pivot holes
221a of the pivot seats 221 and the pivot holes 232 of the cam
plates 231 so as to pivotally mount the pull lever 23 in the pivot
seats 221 of the latch frame 22. In normal state, the latch frame
22 itself resiliently outward stretches. The slope sections 222b of
two ends of the latch frame 22 are oppositely pushed by bottom
edges of lateral walls 214 of the locating frame 21, whereby the
cam plates 231 of the pull lever 23 lean against the locating frame
21 in normal state. Accordingly, the handle 233 of the pull lever
23 can be operated and biased to drivingly pull the latch frame 22
upward and make the latch arms 222 thereof respectively tightly
hook in the latch holes 31 of a latch seat 3. Under such
circumstance, the heat-radiating radiating fin body 1 is downward
pressed, whereby the bottom thereof tightly attaches to the chip 4
to enhance the heat-radiating efficiency for the chip 4.
Referring to FIGS. 1 to 5, the heat-radiating fin body 1 of the
present invention includes a base board section 11. Two lateral
boards 12 respectively upward extend from two sides of the base
board section 11. The top end of each lateral board 12 is formed
with a latch groove 121. The inner side of the latch groove 121 is
formed with a locking groove 123 for screws to screw therein and
lock a heat-radiating fan 14 on the heat-radiating fin body 1.
Multiple upright heat-radiating fin plates 11a are disposed between
the two locking grooves 123 to enhance the heat-radiating
efficiency.
Referring to FIGS. 1 to 4, the locating frame 21 of the fastener
unit 2 is made of metal board by integral punching. The locating
frame 21 includes a body section 210. At least one fixing wing 211
integrally downward extends from a lateral edge of the body section
210. At least one projecting hook section 21 la is formed on the
fixing wing 211 for correspondingly hooking the bottom edge of the
latch groove 121 of the heat-radiating fin body 1 and preventing
the locating frame 21 from upward departing from the heat-radiating
fin body 1. The body section 210 is formed with at least one slot
213 through which the pivot seat 221 of the latch frame 22 upward
extends. Two lateral walls 214 respectively downward extend from
two ends of the body section 210 to hold and clamp outer sides of
the latch arms 222 of two ends of the latch frame 22.
The edges of the body section 210 of the locating frame 21 are
further formed with two locating plates 215 for correspondingly
holding and clamping two sides of the latch groove 121 of the
heat-radiating fin body 1 and preventing the locating frame 2 from
transversely sliding on the heat-radiating fin body 1.
The latch frame 22 is made of metal board by integral punching,
including a main body 220. At least one pivot seat 221 projects
from the main body 220. Two latch arms 222 respectively integrally
downward extend from two ends of the main body 220. The free end of
each latch arm 222 is inward bent to form a hook section 222a for
correspondingly hooking in the latch hole 31 of the latch seat
3.
The middle portion of each latch arm 222 of the latch frame 22 is
outward downward bent to form a slope section 222b. When the latch
frame 22 is upward pulled by the pull lever 23, the slope sections
222b are oppositely pushed by the bottom edges of the lateral walls
214 of the locating frame 21, whereby the bottom sections of the
latch arms 222 are resiliently biased toward the latch seat 3 and
the hook sections 222a of the latch arms 222 can be firmly latched
in the latch holes 31 of the latch seat 3. In normal state, the
slope sections 222b push the lateral walls 214 downward projecting
from two ends of the locating frame 21 so as to make the latch
frame 22 distal from the locating frame 21 in normal state.
Two guiding inclined boards 216 respectively downward outward
extend from free ends of the lateral walls 214 of the locating
frame 21. When the latch frame 22 is lifted, the slope sections
222b of the latch arms 222 are guided by the guiding inclined
boards 216 to ascend and the latch arms 222 are automatically
inward resiliently biased. Accordingly, the hook sections 222a of
the latch arms 222 are tightly latched in the latch holes of the
latch seat.
Moreover, the main body 220 of the latch frame 22 can be punched
with at least one reinforcing rib 224 to increase the strength of
the latch frame 22. Accordingly, when upward pulled by the pull
lever 23, the latch frame 22 is protected from being bent and
deformed.
As shown in FIGS. 1 and 2, a pair of cam plates 231 upward radially
extend from two sides near a first end of the pull lever 23. The
faces of the cam plates 231 are formed with pivot holes 232. A
pivot pin 24 is sequentially passed through the pivot holes 221a of
the pivot seats 221 and the pivot holes 232 of the cam plates 231
so as to pivotally mount the pull lever 23 in the pivot seats 221
of the latch frame 22.
The face of each cam plate 231 has a first cam edge 231a, a second
cam edge 231b and a third cam edge 231c. The first distance between
the first cam edge 231a and the pivot hole 232 is shortest. The
second distance between the second cam edge 231b and the pivot hole
232 is longer than the first distance. The third distance between
the third cam edge 231c and the pivot hole 232 is longer than the
second distance.
Referring to FIG. 6, when the first cam edge 231a of the cam plate
231 contacts with the locating frame 21, the distance between the
locating frame 21 and the latch frame 22 is longest. The latch
frame 22 sinks and the latch arms 222 of two ends of the latch
frame 22 are not restricted by the lateral walls 214 of the
locating frame 21 and will outward stretch in a totally released
state.
When the second cam edge 231b of the cam plate 231 contacts with
the locating frame 21, the distance between the locating frame 21
and the latch frame 22 is slightly shorter and the latch frame 22
slightly ascends. The latch arms 222 of the latch frame 22 start to
be restricted by the lateral walls 214 of two ends of the locating
frame 21 and inward converged to be slightly latched in the latch
holes 31 of the latch seat 3 in a temporarily latched state.
Referring to FIG. 7, when the third cam edge 231c of the cam plate
231 contacts with the locating frame 21, the distance between the
locating frame 21 and the latch frame 22 is shortest and the latch
frame 22 ascends to an uppermost position. The latch arms 222 of
the latch frame 22 are totally restricted by the lateral walls 214
of two ends of the locating frame 21 and entirely inward converged
to be completely latched in the latch holes 31 of the latch seat 3
in a fully firmly latched state.
When assembled, as shown in FIGS. 1 to 5, a fastener unit 2 is
mounted on each side of top end of the heat-radiating fin body 1.
The bottom end of the heat-radiating fin body 1 is overlaid on a
chip 4. At this time, the latch arms 222 of the latch frame 22 are
respectively positioned on outer sides of the latch holes 31 of the
latch seat 3 as shown in FIG. 6. Under such circumstance, an
operator can bias the pull lever 23 in direction R, whereby the cam
plate 231 of the first end of the pull lever 23 downward presses
the locating frame 21. At this time, the latch frame 22 is
reversely pulled upward and the latch arms 222 thereof also ascend
along with the latch frame 22. When the slope sections 222b of the
latch arms 222 abut against the bottom edges of the lateral walls
214 of the locating frame 21 and are further pulled upward as shown
in FIG. 7, the latch arms 222 are oppositely inward resiliently
biased by the bottom edges of the lateral walls 214. At this time,
the hook sections 222a of the latch arms 222 are pulled upward and
tightly latched into the latch holes 31 of the latch seat 3.
Accordingly, the heat-radiating fin body 1 is tightly bound over
the chip 4.
When it is desired to loosen the heat-radiating fin body 1, the
operator can turn the pull lever 23 in direction R1 of FIG. 7,
making the cam plate 231 of the pull lever 23 move upward away from
the locating frame 21. At this time, the latch arms 222 and slope
sections 222b of the latch frame 22 push the bottom edges of the
lateral walls 214 of the locating frame 21, whereby the latch arms
222 are moved downward. The hook sections 222a of the latch arms
222 are automatically unlatched from the latch holes 31 of the
latch seat 3. Under such circumstance, the operator can detach the
heat-radiating fin body 1 from the latch seat 3 for replacing the
chip 4.
As shown in FIG. 7, when the hook sections 222a are latched in the
latch holes 31 of the latch seat 3, the outer sides of the latch
arms 22 are respectively stopped by the lateral walls 214 of the
locating frame 21 from being outward biased. Accordingly, the
fastener is prevented from detaching from the latch seat due to
shock and the computer product can pass the falling test when
released. In addition, in use of the present invention, a user only
needs to turn the pull lever 23 so that the operation of the
present invention is easy. Moreover, the present invention has
simple structure and can be easily assembled.
The above embodiment is only used to illustrate the present
invention, not intended to limit the scope thereof. Many
modifications of the above embodiment can be made without departing
from the spirit of the present invention.
* * * * *